Hermann Wilhelm Vogel (26 March 1834 – 17 December 1898) was a German photochemist and photographer[1] who discovered dye sensitization, which is of great importance to photography.
Hermann Wilhelm Vogel
Hermann Wilhelm Vogel, with signature in partial Kurrent handwriting script
After finishing school in Frankfurt (Oder), he studied at the Royal Industrial Institute of Berlin, earning his Ph.D. with Karl Friedrich August Rammelsberg in 1863. Vogel's thesis, which was published in Poggendorffs Annalen , had the title: Über das Verhalten des Chlorsilbers, Bromsilbers und Iodsilbers im Licht und die Theorie der Photographie[2] (Reactions of Silver Chloride, Silver Bromide and Silver Iodide with Light and the Theory of Photography). This marked the beginning of his research into the photographic process.[3]
From 1860 until 1865, he was an assistant in the mineralogical museum of the University of Berlin, and from 1884 was director of the photo-technical laboratory of the Technical Institute there. From 1864 he was a professor at Berlin's Technische Hochschule (from 1879, the Technical University of Berlin), where he introduced photography as a field of study.[3]
Dye sensitizationedit
In 1873 Vogel discovered dye sensitization,[4] a pivotal contribution to the progress of photography. The photographic emulsions in use at that time were sensitive to blue, violet and ultraviolet light, but only slightly sensitive to green and practically insensitive to the rest of the spectrum. While trying out some factory-made collodionbromidedry plates from England, Vogel was amazed to find that they were more sensitive to green than to blue. He sought the cause and his experiments indicated that this sensitivity was due to a yellow substance in the emulsion, apparently included as an anti-halation agent. Rinsing it out with alcohol removed the unusual sensitivity to green. He then tried adding small amounts of various anilinedyes to freshly prepared emulsions and found several dyes which added sensitivity to various parts of the spectrum, closely corresponding to wavelengths of light the dyes absorbed. Vogel was able to add sensitivity to green, yellow, orange and even red.[5][6][7]
This made photography much more useful to science, allowed a more satisfactory rendering of colored subjects into black-and-white, and brought actual color photography into the realm of the practical.[8]
In the early 1890s, Vogel's son Ernst assisted German-American photographer William Kurtz in applying dye sensitization and three-color photography to halftone printing, so that full-color prints could be economically mass-produced with a printing press.[9]
Other activitiesedit
In addition to his work as a photographic technical innovator, Vogel taught Alfred Stieglitz between 1882 and 1886.[10] He participated in at least two photographic expeditions to Egypt as well as others to Italy and possibly Asia.[11] Vogel founded the periodical Photographische Mittheilungen in 1864 and served as its publisher until his death.
His silver tester, photometer for pigment printing and heliotype printing, and universal spectroscope were introduced into general use. He visited the United States in 1870 and 1883.[12]
Publicationsedit
Wikisource has original works by or about: Hermann Wilhelm Vogel
Lehrbuch der Photographie (Third edition, Berlin 1878)
Praktische Spektralanalyse irdischer Stoffe (Second edition, Berlin 1888)
Die chemischen Wirkungen des Lichts und die Photographie (Second edition, Leipzig 1883)
Die Photographie farbiger Gegenstände in den richtigen Tonverhältnissen (Berlin 1885)
Vom Indischen Ozean bis zum Goldland Reisebeobachtungen (Berlin 1878)
Lichtbilder nach der Natur (Berlin 1879)
The Chemistry of Light and Photography, in Their Application to Art, Science, and Industry (New and thoroughly revised edition, D. Appleton, New York 1889)
Über das Spiritistentreiben (Berlin 1880)
Notesedit
^Hannavy, John (2013-12-16). Encyclopedia of Nineteenth-Century Photography. Routledge. ISBN978-1-135-87327-1.
^(de)119 Annalen der Physik, Leipzig, 1863, pp. 497
^Vogel, H: "On the sensitiveness of bromide of silver to the so-called chemically inactive colours", Chemical News, December 26, 1873:318-319, copying from The Photographic News, date and page not cited but apparently December 12, 1873, in turn translated from Vogel's own publication Photographische Mittheilungen, December, 1873 10(117):233-237.
^Vogel, H: "Photo-spectroscopic researches", The Photographic News, March 20, 1874:136-137, translated from Photographische Mittheilungen, February, 1874 10(119):279-283.
^Vogel, H: "Rendering actinic non-actinic rays", The Photographic News, July 3, 1874:320-321. In this communication, apparently in the original English, Vogel answers critics who suggest that the sensitivity into red which he reports is an error due to an impure spectrum by noting that the Fraunhofer lines recorded on his test plates are in their correct locations, which would not be the case if the photographic action were due to light of other wavelengths. For further details cf. Klaus Hentschel: Mapping the Spectrum, Oxford: OUP, 2002.
^Meldola, R. (October 1874). "Recent Researches in Photography" . Popular Science Monthly. Vol. 5. pp. 717–720. ISSN 0161-7370, copying from Nature. After summarizing the discoveries of Vogel and Edmond Becquerel, this article notes some of the prospective benefits to science and to photography in general. Caution: an error found in early English-language reports of Becquerel's results with chlorophyll is repeated here. In his original paper in French (Comptes Rendus (1874) 79:185-190) Becquerel reports strong action between Fraunhofer lines C and B (red), not C and D (orange) as it appears in a widely-copied English translation which is reflected here. Subsequent references to these lines in his paper confirm that "C et B" as it appears on page 188 of the original is correct.
^Hirsch, Robert; Erf, Greg (2010-12-28). Exploring Color Photography: From Film to Pixels. Taylor & Francis US. p. 24. ISBN9780240813356. Retrieved 28 July 2012.
Erich Stenger (1934). "Hermann Wilhelm Vogel". Naturwissenschaften. 22 (12): 177–181. Bibcode:1934NW.....22..177S. doi:10.1007/BF01494919. S2CID 33100564.
External linksedit
Herman Wilhelm Vogel (1875) The chemistry of light and photography - Linda Hall Library
"A Simple Test For Carbonic Oxide", Scientific American article on carbon monoxide detection developed by Vogel, 23 June 1877, p. 386
January 01, 1970
hermann, wilhelm, vogel, confused, with, hermann, carl, vogel, march, 1834, december, 1898, german, photochemist, photographer, discovered, sensitization, which, great, importance, photography, with, signature, partial, kurrent, handwriting, scriptborn26, marc. Not to be confused with Hermann Carl Vogel Hermann Wilhelm Vogel 26 March 1834 17 December 1898 was a German photochemist and photographer 1 who discovered dye sensitization which is of great importance to photography Hermann Wilhelm VogelHermann Wilhelm Vogel with signature in partial Kurrent handwriting scriptBorn26 March 1834Dobrilugk Kingdom of PrussiaDied17 December 1898 1898 12 17 aged 64 Berlin German EmpireNationalityGermanAlma materUniversity of BerlinScientific careerFieldsPhotochemistry photographyInstitutionsTechnical University of BerlinDoctoral advisorKarl Friedrich August RammelsbergDoctoral studentsAlfred Stieglitz Contents 1 Academic career 2 Dye sensitization 3 Other activities 4 Publications 5 Notes 6 References 7 External linksAcademic career editAfter finishing school in Frankfurt Oder he studied at the Royal Industrial Institute of Berlin earning his Ph D with Karl Friedrich August Rammelsberg in 1863 Vogel s thesis which was published in Poggendorffs Annalen had the title Uber das Verhalten des Chlorsilbers Bromsilbers und Iodsilbers im Licht und die Theorie der Photographie 2 Reactions of Silver Chloride Silver Bromide and Silver Iodide with Light and the Theory of Photography This marked the beginning of his research into the photographic process 3 From 1860 until 1865 he was an assistant in the mineralogical museum of the University of Berlin and from 1884 was director of the photo technical laboratory of the Technical Institute there From 1864 he was a professor at Berlin s Technische Hochschule from 1879 the Technical University of Berlin where he introduced photography as a field of study 3 Dye sensitization editIn 1873 Vogel discovered dye sensitization 4 a pivotal contribution to the progress of photography The photographic emulsions in use at that time were sensitive to blue violet and ultraviolet light but only slightly sensitive to green and practically insensitive to the rest of the spectrum While trying out some factory made collodion bromide dry plates from England Vogel was amazed to find that they were more sensitive to green than to blue He sought the cause and his experiments indicated that this sensitivity was due to a yellow substance in the emulsion apparently included as an anti halation agent Rinsing it out with alcohol removed the unusual sensitivity to green He then tried adding small amounts of various aniline dyes to freshly prepared emulsions and found several dyes which added sensitivity to various parts of the spectrum closely corresponding to wavelengths of light the dyes absorbed Vogel was able to add sensitivity to green yellow orange and even red 5 6 7 This made photography much more useful to science allowed a more satisfactory rendering of colored subjects into black and white and brought actual color photography into the realm of the practical 8 In the early 1890s Vogel s son Ernst assisted German American photographer William Kurtz in applying dye sensitization and three color photography to halftone printing so that full color prints could be economically mass produced with a printing press 9 Other activities editIn addition to his work as a photographic technical innovator Vogel taught Alfred Stieglitz between 1882 and 1886 10 He participated in at least two photographic expeditions to Egypt as well as others to Italy and possibly Asia 11 Vogel founded the periodical Photographische Mittheilungen in 1864 and served as its publisher until his death His silver tester photometer for pigment printing and heliotype printing and universal spectroscope were introduced into general use He visited the United States in 1870 and 1883 12 Publications edit nbsp Wikisource has original works by or about Hermann Wilhelm Vogel Lehrbuch der Photographie Third edition Berlin 1878 Praktische Spektralanalyse irdischer Stoffe Second edition Berlin 1888 Die chemischen Wirkungen des Lichts und die Photographie Second edition Leipzig 1883 Die Photographie farbiger Gegenstande in den richtigen Tonverhaltnissen Berlin 1885 Vom Indischen Ozean bis zum Goldland Reisebeobachtungen Berlin 1878 Lichtbilder nach der Natur Berlin 1879 The Chemistry of Light and Photography in Their Application to Art Science and Industry New and thoroughly revised edition D Appleton New York 1889 Uber das Spiritistentreiben Berlin 1880 Notes edit Hannavy John 2013 12 16 Encyclopedia of Nineteenth Century Photography Routledge ISBN 978 1 135 87327 1 de 119 Annalen der Physik Leipzig 1863 pp 497 a b Grove Art Online Vogel Hermann Wilhelm Dye Sensitization Vogel H On the sensitiveness of bromide of silver to the so called chemically inactive colours Chemical News December 26 1873 318 319 copying from The Photographic News date and page not cited but apparently December 12 1873 in turn translated from Vogel s own publication Photographische Mittheilungen December 1873 10 117 233 237 Vogel H Photo spectroscopic researches The Photographic News March 20 1874 136 137 translated from Photographische Mittheilungen February 1874 10 119 279 283 Vogel H Rendering actinic non actinic rays The Photographic News July 3 1874 320 321 In this communication apparently in the original English Vogel answers critics who suggest that the sensitivity into red which he reports is an error due to an impure spectrum by noting that the Fraunhofer lines recorded on his test plates are in their correct locations which would not be the case if the photographic action were due to light of other wavelengths For further details cf Klaus Hentschel Mapping the Spectrum Oxford OUP 2002 Meldola R October 1874 Recent Researches in Photography Popular Science Monthly Vol 5 pp 717 720 ISSN 0161 7370 copying from Nature After summarizing the discoveries of Vogel and Edmond Becquerel this article notes some of the prospective benefits to science and to photography in general Caution an error found in early English language reports of Becquerel s results with chlorophyll is repeated here In his original paper in French Comptes Rendus 1874 79 185 190 Becquerel reports strong action between Fraunhofer lines C and B red not C and D orange as it appears in a widely copied English translation which is reflected here Subsequent references to these lines in his paper confirm that C et B as it appears on page 188 of the original is correct Hirsch Robert Erf Greg 2010 12 28 Exploring Color Photography From Film to Pixels Taylor amp Francis US p 24 ISBN 9780240813356 Retrieved 28 July 2012 Alfred Stieglitz Mr J R Gossage Dr H W Vogel 2000 Empire Nazraeli Press Rines George Edwin ed 1920 Vogel Hermann Wilhelm Encyclopedia Americana References editErich Stenger 1934 Hermann Wilhelm Vogel Naturwissenschaften 22 12 177 181 Bibcode 1934NW 22 177S doi 10 1007 BF01494919 S2CID 33100564 External links editHerman Wilhelm Vogel 1875 The chemistry of light and photography Linda Hall Library A Simple Test For Carbonic Oxide Scientific American article on carbon monoxide detection developed by Vogel 23 June 1877 p 386 Retrieved from https en wikipedia org w index php title Hermann Wilhelm Vogel amp oldid 1200542566, wikipedia, wiki, book, books, library,
